user-manual: use pithier example commit

diff --git a/Documentation/git-mergetool.txt b/Documentation/git-mergetool.txt
index 34288fe08b3962554178fd8a6baa8f7030096baf..add01e855a09c34b6aa9c83af6efcd17f24f3c9d 100644 (file)
--- a/Documentation/git-mergetool.txt
+++ b/Documentation/git-mergetool.txt
@@ -25,7 +25,7 @@ OPTIONS
 -t or --tool=<tool>::
        Use the merge resolution program specified by <tool>.
        Valid merge tools are:
-       kdiff3, tkdiff, meld, xxdiff, emerge, and vimdiff.
+       kdiff3, tkdiff, meld, xxdiff, emerge, vimdiff, and opendiff
 +
 If a merge resolution program is not specified, 'git mergetool'
 will use the configuration variable merge.tool.  If the